Title:
MANUFACTURING METHOD OF ULTRAVIOLET ABSORBABLE PLASTIC LENS
Document Type and Number:
Japanese Patent JP2004264777
Kind Code:
A
Abstract:
To provide a manufacturing method of an ultraviolet absorbable plastic lens by which a composition for a plastic lens containing an ultraviolet absorbent and a photopolymerization initiator having absorption characteristic in a visible light region can be uniformly photopolymerized.
As a light source for photopolymerization, light sources 11, 12 having spectral energy distribution in which energy concentrates in 400 to 450 nm wavelength region, are used. A metal halide lamp in which gallium halide, for example, is added is used as the light source.
Inventors:
IRYO TAKEAKI
Application Number:
JP2003057507A
Publication Date:
September 24, 2004
Filing Date:
March 04, 2003
Export Citation:
Assignee:
SEIKO EPSON CORP
International Classes:
G02C7/02; C08F2/01; C08F2/44; G02B1/04; G02B3/00; (IPC1-7): G02B3/00; C08F2/01; C08F2/44; G02B1/04; G02C7/02
Attorney, Agent or Firm:
Masahiko Ueyanagi
Fujitsuna Hideyoshi
Osamu Suzawa
Fujitsuna Hideyoshi
Osamu Suzawa